electromechanics
Hi, Can anybody tell me how to apply vaccum of 70-mtorr around my model clamped-clamped beam resonator.Something like keeping my model inside a chamber of vaccum.
View Articletutorial "Scatter on Substrate"
Dear all, Is it possible to practice the tutorial "Scatter on Substrate" on version 4.3?www.comsol.com/showroom/documentation/model/14443/ I want to simulate the transmission through the metal...
View ArticlePlasma nitrogen
Hello. Does anyone have data for the simulation of plasma ICP for nitrogen? Thank you.
View ArticleHELP NEEDED fluid mixing.
Hi I have been working on a flow micromixer that has two inlet and an outlet. I have two fluids, one is very dense and the other is a very dilute substance, both of them are completely different and...
View ArticleHow to make COMSOL spread out mesh nodes more evenly?
Hi there, I'm using a COMSOL model (see attached mph-file) via LiveLink in MATLAB where I especially need to reconstruct certain values throughout the whole domain (in the context of...
View ArticleMoving mesh example
Hi, Is there any example of using moving mesh with a pdf guideline? I need to model a moving magnet next to a coil and calculate the induced voltage!
View Articlemoving user defined material library
Hi, How to move user defined material library from comsol 4.2a to comsol 4.3a? Regards, Susant
View ArticleEigenfrequency study with FSI interface in 4.3a
I attempted to use the FSI interface with the eigenfrequency study step using its default configuration under 'custom studies' in the model wizard. The study step indicates a warning, however, so I...
View ArticleCluster-Computing with Comsol
Hi! Im am trying to configure Comsol 4.1 for parallel computing on a number of nodes (currently 3) on a Scientific Linux System using PBS. I found out i had to set up a mp-daemon on each of the nodes...
View ArticleNACA 0012 Airfoil with Spalart-Allmaras turbulence model
Hello, I am new to COMSOL and I thought I would start with a relatively simple model: a NACA 0012 airfoil at 0 angle of attack. The domain is small and the mesh resolution is relatively coarse to get...
View ArticleConstrains and laminates
Hello, id like to simulate a laminate with around 5 isotropic laminated layers. These layers are in the form of a plate with a constant area load. The model is a laminate for photovoltaics with area...
View ArticleModel couplings: Integration vs. Summation over nodes
Hello, I am working with two modules Structural Mechanics and general form PDE as coupled. I need a model coupling to define an integration. When I choose "Summation over nodes", my model works fine,...
View Articleinitial Values of Variables Solved For
Hi, I have someting to know. As you know, the initial condition set is as follows: initial Values of Variables Solved For Method: initial expression, Solution Solution: Zero, Solver1, Solver2 in...
View Articlehow to calculate deformation??
hi, i am trying to design a nanotube based pressure sensor, am getting some displacement values for pressure applied on nanotube boundaries but how can i verify the result...how can displacement be...
View ArticleHow to solve a ODE or PDE equation?
Hi~ I try to use COMSOL to solve the mathematical problem. I have a PDE equation in attachment. How could I use COMSOL to solve it? Thank you~
View ArticleEditing equationin at Expression in Variables from Equation views
Hi all, I’m playing with thermo-mechanic coupling. In the mechanical part, I use solid mechanics with Norton Creep. In this creep, I would like to have nD=1. That’s why I’ve changed Expression in...
View Articledefine the propagation constant and angle of incidence and refraction at...
Dear friends, define the propagation vectors in a multilayer system. i have attached the simulation detail in the attachment . somebody help me out to solve this problem Aim: To find out the...
View ArticleImpedance mismatch in quasistatic
Hello everybody! I need the help of people familiar with AC/DC and RF module. I am working with a 3D structure consisting of 2 pads, 100um*200um*0.2um, separated by a 1um slot line. The pad are shorted...
View ArticlePipe flow module / Falied to evluate variable Jacobian
I am working over a simple pipe flow problem, where I encountered with an Jacobial Error saying ; Failed to evaluate variable Jacobian. - Variable: mod1.nipfl.u3 - Geometry: 1 - Boundary: 7 10 13 I...
View ArticleTheory of Brinkman equation
I'm checking the theory of the Brinkman equation in the manual. There's a term I don't understand where stems from: 2/3nu(nabla u). I also checked the given references but this term is not metioned....
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